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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c91c94d1a4f1a3a77d55e2200d95dba610abaf705e5b4cfbc02f18c12d0205b' 
  AND token = 'Qvn7IQ9s5H9TDWtS7pusGMO1Q9tQU8sOJt5sZOTGuYs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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