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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95da0521755dcfc516b282059d0c63ec2342568f72f7dcb9c64df46f41d17974' 
  AND token = 'TUlCo0TUZoY9FptNojK6j4L6m8gndLxWebLUKz/9438=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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