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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0beadb478e991c8b090a2427858b59fecf99532eecdd0bee60dd5291e63c941e' 
  AND token = 'lt6aP7fOZnmqBnd4BOmi0l8JqFOClsqLw0Ts01AC83Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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