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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f07f6918e00415f7643ad49e555fa02a65df933c4082f85ed04a7a2805d0340e' 
  AND token = 'Ojnw1OpitvCSr0bVDMEcjawPj4e3n6P40x+Zd5Wtb/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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