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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2fc974c91a821a44a4fb415bf46f9111eed885e0d9df9730ceb3bfd918d13d8b' 
  AND token = 'FZGEXzGwrx3EoGr/oCBldikCW3U8WOQdzK6cfpONx9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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