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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd959177ae1a639c5c18e95ac1603e5f560c61e7bd6182605339a8d0f7c46eddf' 
  AND token = '9WHjuo3Mk9pTn9FfirIa4RQF6NuIh89P18ddEl5ZzqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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