SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb065938a8ca7f2b8a05286c1e52478af0919bc73ff8b57fc976753142277441' 
  AND token = 'LN/IFPMpNom+G/Zhss8+edhszxgbV4W7gfA2Pl4mFFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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