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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf4efe94dbdcc51c5507e7b66046278d32f6442f163b0da0cb7a993fae649ee2' 
  AND token = 'goe9hGdWTEGS6OQdCmMhO9YHt+jKk1j7uZLvq14Gk7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00062

JSON explain

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