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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab32ca9c3a5d653f4da88c7a0df69e5fe6ca364d8a2f16281143f0ca99dbfc71' 
  AND token = '9YTF6+MATam152CgOZU+OkfAf1uWaF/JY3Lt3BsjtMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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