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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7260ccce2a6e8d840ed24bba486fdb7b2d272e51466182ab51476ea5b2a22276' 
  AND token = '3NCZj50dPT1zI4vqCFTkoB8ON4ZD28wMb2oTvNLxLhY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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