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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '446245ca21844cd06a5a83d7966d8faa026ee429a98662589d3211991245cb5b' 
  AND token = 'q8AhU6EncRk4Ni0hCBhfBx+tOqJn2ntB2JE7hAMyFQg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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