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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5fe9367e10162f978b0d78176ebe53ae4cd737b64835a0cfd4123ecef296e80b' 
  AND token = 'IMt+Jbg6ebAunc3TRX7yfMAGAjn6CxxZM/TO2mV8ENQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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