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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ec2a24b0845e61088869faa2748d332aad343c890f39f012fe14066d1480278e' 
  AND token = 'r3BaTayBJdsfiJ1AWfAyLb9w8B+2oY1QQFLJ4tAnSNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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