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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '15c1c167e383177675e578518a8477cf28a77bf901f64b6bcfe3551e5d83f289' 
  AND token = 'gUdDCPBFOi80z2gEpQT/hS5+VASavbX4mIMFgOl+foQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

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