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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e48246a1d6ba1d97c1df2f5198664272dedd467e9c70cc5f68c5286c065e998d' 
  AND token = 'w567FZLZEMh5iUKLyHw4q2SK+PkMb2Hp1uV3f4Nss+0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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