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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ecf7ca822eae8deb9e0b47ca573a5942d304e2f17f4bf5b12deee94cac7cf3af' 
  AND token = 'mSvP6RrZ/CfmnfbXZrqvjuMy4TbqvlSLYBt+A/LxPUc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}