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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0032fc5fcb37aeb8ccd939b8917f1d7859040078d76fb4c46882bacc8f5d80e6' 
  AND token = 'NCct3TSPCnRYsr9FWHP1+RC6PqAB8PayhBIbItoeRxc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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