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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b23f911f65d29fe7dcd5010c53f170ea4d1113e44b51298547877cc4a439b65a' 
  AND token = 'YqD4sudK2KBIAU5W1sNWr4kpGkqjelSdiXqw3giftQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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