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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09179c95cc0e2a9d50d4581e3f607ec6a0efc3130aad898a969ee2aefb8c6df1' 
  AND token = 'PuiGFl9/xeEJT9pyz9bK8p5UvK4Wakxi5HTNwHMb0H0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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