Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5531ddf42522210e07b0f88141274a7d25a647fea9b028f2b0c1f6b5a72fc3d6' 
  AND token = 'gyfhQA71TNTnCvra5I1f7zySQi9mxO7OxQ6RnHpKzII=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}