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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2e86f5f2ed141d9ae0881c047165a0b232f34006d663851e21284e99264a8248' 
  AND token = 'v1+MVJfy78PtP57d8xjJrKk+XDJ58wM+nyrjky8W6WU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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