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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba26860d710d25e8cb4e73f09e0363b81485f500059ebf5265aae72d7cc882ed' 
  AND token = 'ICf/s98EtNiTx4Ou58YO5OHX1X/SH0txk/vXb+byxCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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