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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce72e92d2755de4f1df7a60132b8dae11166cfa20c5c53adb443269e9d18770a' 
  AND token = 'SVfmmeMsGxPRzzfaF2qu0p6yZQy4U9gjtusZtPasDjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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