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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60a8e04aa018910963e77a21f9c72acc91cf3762cdda30ff1eeb5014a54df7e2' 
  AND token = 'EX12fpHL4BAXDFue+NVfxdgWyCJ2Ku0/ZB7cweh9sbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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