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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ffbd9fb351c5fc85ef37addac34a12e4cd62619d1efe87224d5e41a2fc65127d' 
  AND token = '4Gk0PPUw4p+4AFA8IPe/8hlMuzTcy5F53a25xidQmjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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