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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '09c27e32d981b2d2ce59e40f8aa02602ced66af28f2d559c116d59df5fabd849' 
  AND token = 'GaX7G/aJ3y9nH1xx6+LX19pKgSLqk46yT6v/PiqD2w0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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