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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '8c99e85f8debd1eaa953b8ad064ddb30c7dc32cb3ad89913e97e0aa8b0ab3b98' 
  AND token = '7uzyczF9pE4R5zFsT9xYcRAmeXtDgQWzPYm6gD6ZF3E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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