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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '200d08f79ae826a0555773a69fec3c047962487be364ff595ebb634872954114' 
  AND token = 'ibPUAw7rEI+vdfcE/BPCsq/iVZN5KQU/yxET5ipHk5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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