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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bcca245f5d44be1b3d833f3c8dae53b7902c85d1671c27a2797f59decd564639' 
  AND token = 'ph0tDTxi6c55Qvv3l7XxIG+K9NGUO4M8lFgemvt3SVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}