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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '5ea5a9df71d3af4824db95800379ff68a0d0cf4fcca0c81ecb984ac2baca413e' 
  AND token = 'm0vYO/QXqRbRxQTB8mBnBRybj1/FQwBwAXBVegAxFVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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