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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11fbbd98e5b097c30a4c8a08094e1fa675dff43c28cf974f5037fc004ccaf847' 
  AND token = 'lzG+GmBqmEqroInwIKfDko79VnZcV8VCCfQqa6O+QI0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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