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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '82d8308312b49a724c8b7561ec42949458fce653c800a4aa4393d8f2e7fd1dda' 
  AND token = 'dHUMV1EPZPeH6lVtmVjdOjUc4+j0aPvnvQsf8d9J5EQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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