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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '07d10e63472e0cfd709c39a352629a1ba0efbd673c9d4d496e50ddbaf404e2bb' 
  AND token = 'jEjSrLCbSyzrjPEq5yhWTMyMm0I21u+tbtwv1pYK5IM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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