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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd85d562d7f12c2710915331d60778afa019b839120018a88092f68692452da34' 
  AND token = 'ZhWvBj9fHM5GD0ARaocF9zq4R1b8t5H8+lG/W02qwac=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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