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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e404f070ed9af8d51b1333be4c6dce40d577e2cb248aced7d5a88a9c5654b4b' 
  AND token = '2JGGFkyQ00liYCpmcpPEJbkemlRC9Ka42TKvcoCYVos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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