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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '87572dc911a5d0851bcb99274a7173b1293ac5dce283f0fc4d0af8903573b3b8' 
  AND token = '+Kp08WaU+TuP29LOh4kLcl54p6SoPm0oz1uoqm7U9Zo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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