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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'adb02e7433a8b31ce1700ee3bb03a0dfa69c214d320c248880b33057cb5d96b1' 
  AND token = 'lpsbuY44N2p6DGjJVwaCqvkxB6Zlu421rJHOgTLn3IM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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