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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bbedeec02ffa84bbe31e545ed733af495d01caeaf039fa6a9299c7e9e5d8ff2' 
  AND token = 'mDLOuJkL3a/u6kC9u8ErnsVFCDZzEW2CmZoCLlyc5qE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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