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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94601dfa741b2ab1cb67d019d2b4afe0af2f1632fd8f442ea732670c552f8afa' 
  AND token = 'GzGk0dNnb14XQLeIzMmI+xgQK/mk4C1O1asvU1LSiNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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