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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '069e119036ac0a47244601efcbbc8c7ce07e97112436b98a44ee984e79f7ddfd' 
  AND token = 'x0NoHDp/M+CNpXV4a7q7+hgq2pPQSsK/0BywhKB9uNo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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