SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c1a332722150413b0c1ee46ba8868d1f2bee5971903263ae834571c722cc9d6' 
  AND token = '5hGEDpgvFkOPflwcZ6FC+qsQs+wCTKRi8C1GEkRQ+gw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}