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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94cd164d929879c7a3ed349026c67e648cfec1cdf17ad8c7419b0832cfc95ce1' 
  AND token = '7vVTjcAlCEO21fIcQ2C+xR65dZ5JRNxsI6ibJJqXb+o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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