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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f1d9b257fb17e4067dfea7b50bd38e441effa186ca178bbfd30b0619099c79b' 
  AND token = 'aH6u8u/rfE/1yy12k2UGdyk2LVSL4ntwBSBpAmYfB6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00090

JSON explain

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