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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5812d01abc0aadbe2c4a51e0112674c1e61234cbe9ed9e885586f51d10e13518' 
  AND token = 'RC9HLPWVbhEvdHQrY96Yuyj1Caaghm5zOpXpzjOchD8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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