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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9bfc73114930c48dd3408fa495190e6fd70f9443559176ef31ed71cf272dbb16' 
  AND token = 'dZiaUcNSOYq17ee9RqwSXM1UIkMHyfNSEz8or4/WUcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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