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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62053a7d678d5943e61ffaa002ffcdc7c50fb3d3cd9c6ad319c903072d7319af' 
  AND token = 'yspZKOX9kKWb1Q6UF47Vm1UdX/VlKisSvWM8aNkdLrg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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