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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d740c67ee0e7ae2017faf6c86dc546ae3e39fe492c49f0be6f7ac42335ff436' 
  AND token = 'Px/438AAPCr9e8qcTEx3xtYK553bZWfUHWofJx55pUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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