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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '14a2986a8dc909a2c8320be1a1510bdf784f98bf5a614964063cd20e3eb0513c' 
  AND token = '7P0Qxu7CwweMdrVdMt9h8bvx3UB6s3wQcivqHxRfub4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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