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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3643322c760ef0d1be8e9374cc4351064f15f214317b62df2f53256c756374d8' 
  AND token = 'rwC2dHVfEk6cZh1G1HV+m1OMYBMmhJXogBPS+7fex2A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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