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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86037ae362ba8bcd26e8a279f88efe05b3662f16a91d5f78bf52bd72061de1c6' 
  AND token = 'zKgLQAozwkPUx3c9waf/e3Wz9YL1yUIi8jA/gYneuRc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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