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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c1d7a18cfac8ce1da0ac7e06e58e45ff7e96e7556b4daa775ca4d02876c1ddc1' 
  AND token = 'iTziNkLOEUeEgKlis/F7m5NQ7Dw71gKanmEKy61IAYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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