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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '95ed9e26b1814c5fa8a38cb36151720356a531bae7915b3a1fa95976c36b59e5' 
  AND token = '/Bq1gsUoUDSMMj3X6UPVScoLDD/RoJJEKoqt2jjwctE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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