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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fedb632cb5932858a815752facf82b9988b8275934be8642070ece9cb2d94010' 
  AND token = 'u/7Z0LBV/fUE9LRan8IwZiESa5F3m/iSFozzexq5Am8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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