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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'ae3c40ac46f0a97f093dc3e020535c8126063f59bc617494b47871a683341296' 
  AND token = 'HGbAxKfYIePoMrUKe4aiT0eRkS7ZHU1ccYM9P8OX2ec=' 
  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"
    }
  }
}