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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c80065ca4098ef673792ac8a792649cea1fd71b490ede32336a98d650e21e5b' 
  AND token = 'kwbaBySAYP1/zaApLkZQ/1/7oeMV/2Op8CNr/vZXMFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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