SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e02cef9ca5bc7eb6001b4b736fe8b07137834abd22983c3736a69f5415a7c937' 
  AND token = 'vE4bpmpSJn/ZblCR83DuIU2HyL3HhYtuG5cnwGPC5A0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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