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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b82e3fb4acc5c10f5a86faa3369a58929587529a16ea2db4d4b5cd132d81fd1b' 
  AND token = 'Ynym3su2kcTXsdAliUqpBiFeXjxtqkAx/9DU0rVnHIc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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