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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '654df1a0ceefeba7f3e1808c269d0c87cf0cdebd6398a8bc321dd3cd8665f339' 
  AND token = 'tGUqZ1m3IYKIo+CSmExWYEdShVIm+kRfU3xKcZfhdy8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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