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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd157be4cdb59a528ac6c4e35c29d42e90c2e408f638247fd68d3ae6b50773380' 
  AND token = '75quEsrXWcqA8YuXHvVE/bkbyICK2kyvILtSK3l74sM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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