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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bd185c54a2c9eac8d328b83ce55538937fecd8d0dbab8210df4dc44a8c7f3d89' 
  AND token = 'XxzVzrlM6OnXsP4QQqHqpuC15zb9CYSo/TfpFZIHiuM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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