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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c25db92f8795174dd448bc75a8b3a8e5ee4cc7011fc16432e33b4e86e799cc6d' 
  AND token = 'dgZezSpLj4btx/lGs8tjihO631j7EwNvd+DBmc4TCCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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