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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24d7ac7cc70ef7f1143e5e833d2e3cad4c19c03025e79bafb506d424ee6f6b46' 
  AND token = 'nTuH+F5FY4MQ7vOk0VStcDqUzn0r6A0Fw80ewY+nraw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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