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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0fc966eb0ec38c7348ff51f8dd2fd0a6dcd65a18f274c842d522d594a870abdf' 
  AND token = '+n1Dm9Xs4HWFOpHjfyqHxvTbRR5uGn19zeUtQo7scJA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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