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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a8cfb880cb6397198cb61c1d46bd89aaa2b209c73f0bf00bf61119998b8d855' 
  AND token = 'CcTYpkk4Nnuu/z33Lbx8lTsIcHZp4t61Tlr8wlOeZVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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