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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '084d1035224e5b20cbf8760b0bbdc7fa867df32696e26951b87e547e5441554d' 
  AND token = '3YsqpT3Na6V6s856x9nm0lApMdAniEmEJJ6ALzBWdyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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