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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8eb0c3094d1ad8064839569c82b59a30826e9b071d63a89dc46bf245a66c5863' 
  AND token = 'AG90B5LRTldOX/lVbf11Rg9eeplLzjkaj0Rk6+ryVmA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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