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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9977ea8b0cf0084d5b47044ab0d74fe53861f4a9887fa9b779e37451d59dccf5' 
  AND token = 'XWc98rH7V6g4M5QPaWkRyeOqy5YgVyr51glhjSEovtg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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