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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd00ff0a57c5a0207d1b06d3f655924b0df0e3d5cd3fb81086aa65d275b974f0a' 
  AND token = 'LWaHwWrAtvWWrQBL/8mEkcF5GtY5CekjITAUx/du7FY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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